Physical Therapy Korea (한국전문물리치료학회지)

Korean Research Society of Physical Therapy (한국전문물리치료학회)
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Comparative Immediate Effects of Isometric Chin-tuck and Dynamic Neuromuscular Stabilization on Neck Flexor Muscle Thickness and Upright Sitting Height Posture

  • Shin, Ji-won (Sports Movement Artificial Robotics Technology Institute, Department of Physical Therapy, Yonsei University) ;
  • Yoon, Hyun-sik (Chungnam National University Hospital) ;
  • Park, Ji-ho (Sports Movement Artificial Robotics Technology Institute, Department of Physical Therapy, Yonsei University) ;
  • Kim, Ha-yeon (Translational Research Center for Rehabilitation Robots, National Rehabilitation Center) ;
  • You, Joshua (Sung) H. (Sports Movement Artificial Robotics Technology Institute, Department of Physical Therapy, Yonsei University)
  • Received : 2019.08.01
  • Accepted : 2019.10.06
  • Published : 2019.11.19
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Abstract

Background: Cervical dysfunction is a common pathomechanical marker in individuals with forward head posture (FHP). To overcome the limitations of the isometric chin-tuck (ICT) exercise, dynamic neuromuscular stabilization (DNS), which emphasizes an entire spinal chain exercise, has recently shown promising clinical results. Objects: Purpose of this study was to compare the immediate effects between ICT and DNS techniques. Methods: 43 young subjects (mean age, $24.0{\pm}5.0$ years) were recruited. Group of subjects with FHP were measured under baseline, ICT, and DNS conditions. Outcome measures included sitting height, longus colli (LC) and sternocleidomastoid (SCM) muscle thickness and LC/SCM thickness ratio. One-way repeated measures ANOVA was used to compare the continuous dependent variables among FHP, ICT, and DNS conditions at p<.016. Results: Both ICT and DNS exercise conditions yielded significantly increased LC muscle thickness, LC/SCM thickness ratio and sitting height than did FHP condition (p<.0001, respectively). Sitting height was significantly greater in DNS exercise than in the ICT exercise (p<.0001). Conclusion: The present results demonstrated that sitting height was greater in the DNS exercise than in the ICT exercise, as well as both corrective postural training exercises were effective on LC/SCM muscle balance ratio when compared with the baseline FHP condition. Therefore, it is considered that DNS exercise can be the recommended exercise for people with FHP.

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References

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